5idu

- [socket.io搭建聊天室](https://www.jianshu.com/p/51b0d1f80392)

5idu

```bash
docker version(`-v`)
docker info
docker build -t friendlyhello .  # Create image using this directory's Dockerfile
docker run -p 4000:80 friendlyhello  # Run "friendlyname" mapping port 4000 to 80
docker run -d -p 4000:80 friendlyhello         # Same thing, but in detached mode
docker container ls                                # List all running containers
docker container ls -a             # List all containers, even those not running
docker container stop <hash>           # Gracefully stop the specified container
docker container kill <hash>         # Force shutdown of the specified container

5idu

```js
console.log([
  "                   _ooOoo_",
  "                  o8888888o",
  "                  88\" . \"88",
  "                  (| -_- |)",
  "                  O\\  =  /O",
  "               ____/`---'\\____",
  "             .'  \\\\|     |//  `.",
  "            /  \\\\|||  :  |||//  \\",

5idu

## Require Skills
- JavaScript/ES6/ES7
- Node.js内部核心模块及标准库
- MongoDB，MySql
- Redis
- Nginx
- Socket.io
- 熟悉TCP/IP,UDP,HTTP,HTTPS,WebSocket,XMPP等网络通讯协议
- MQTT协议，WebRTC协议
- Restful Api

5idu

### DRY原则(Don't Repeat Yourself)
* 最初级的DRY：语法级别
  * before
  ```java
  System.out.println(1);
  System.out.println(2);
  ……
  System.out.println(10);
  ```
  * after

5idu

- v-bind
- v-if
- v-for
- v-on
- v-model

待更新...